Home and everyday life
Sign a PDF on your iPhone
When a form arrives while you're out, you don't need a printer or a new app. You can sign it in Safari with your finger and send it straight back from your phone.
Sign PDFFree · No sign-up · Files stay on your device
Open Sign PDF
Why do it in the browser
Signing apps usually want an account, a subscription or your documents on their servers. Think Pages runs in Safari or Chrome, needs no sign-up and keeps the document on your phone.
It works with PDFs saved in the Files app, attachments from Mail, and photos of paper forms.
Key benefits
- Made for fingersDraw your signature on a large pad, then drag it into place. Pinch with two fingers to zoom in on a small signature line.
- No app to installOpen the site, sign, and you're done. It also works offline once it has loaded.
- Save or shareSend the signed PDF with the iPhone share sheet: Mail, Messages, WhatsApp, or Save to Files.
- Paper forms tooPhotograph a paper form with Scan to PDF, then sign the scan.
How to sign a PDF on iPhone
- In Mail or Files, save the PDF to Files (tap the attachment, then Share, then Save to Files).
- In Safari, open Sign PDF on thinkpages.app, tap Open files and choose the PDF.
- Tap Signature, draw with your finger and tap Use this signature. Drag it onto the line; pinch to zoom if you need to.
- Tap Done, then Export PDF, then Share / Save to send it back or keep it in Files.
Tips
- Turn the phone sideways for a wider signing pad.
- Tick Remember on this device so you only draw your signature once.
- Add the site to your Home Screen from Safari's share menu to open it like an app.
Sign PDFFree · No sign-up · Files stay on your device
Open Sign PDF
Questions
Do I need an Apple Pencil?
No. A finger works well. A stylus gives a slightly neater result on an iPad.
Where does the signed PDF go?
After exporting, tap Share / Save and choose Save to Files, or send it directly from the share sheet.
Is my signature stored anywhere?
Only on your phone, in the browser, and only if you choose Remember on this device. It is never uploaded.
Tools for this job
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